Production of oxids of nitrogen from the air.



F. 1; DU PUNT. IBODUTION 0F OXIDS 0F NITROGEN FROM THE AIR.

APPLICATION FILED DEU. 18, 190B.A

l Patented Dec. 21, 1909.

i f.. v, Lag, .A

U-;;,;1TED affaires-PATENT entren.

.IfnuroNTQbr WiLmNeromnEtAwAaE, .Assrenonro THE n.71.' BU Pour lne NEMoUns-rownnn company, .or WILMINGTQN, DELAWARE. A CORPORATION oi:Ev JERSEY.

ritol'mc'zrnml or'oxrns or NITROGEN' FRQM THE Atri:

lSpecification-of Letters Patent.

Patented Dec.v 21,

Application ined December-18, 1908. Serial N.o. 468,107.

Tol aZlwhoinfit mayconcern: Y v "",Be 1t known that I,'FnANG1s I.- DU Pox'r,

.ajbitia'en'fof the Unit-ed' States, residing? at .Wilmingtom 'county of Newcastle, and' State of Delaware,'have in venteda1 new and usefnl -Im ro-v'ement in the .l Production of xids o Nitrogen from the Air, of which described and claimed aprocess for producing oxids of' nitrogen from. the air.- The method. as therein described and. claimed Vconsists in subject-ing the air, in Contact with acooling medium, to the action of a -movin'g orrotating arc whereby the' high heating by the arc is immediately and rap-v idly-reduced. Inthrt. case the air passing through the tube is subjected to the Laction -of'an electric'arc therein, t'vhich is caused. IVto rotate by means ofa rotary magnetic Held surrounding lthe tube at one point',- '-I` have discovered certainA 'improvements vupon this invention, which improvements consist-in providing 'plurality of rotating fields at different points, the fields being oppositely placed so that the arc not only rotates but is caused to 'move along the tube and crossing'the space in the tube. By oppositely placed I mean lia-ving' opposite poles of'. successive magnetic lields facing .eac-h other. By this arrangement throughout thep'assage. of the air Iit: is` subjected severalA times alternately to the. high heating of the rotating ar'c and tothe cooling ot' the cooling medium.

illustrated in section in .The apparatus l can use to carry out my invention-.is quite similar to that. shown and described in the hereinbe'fore mentioned aplv plication, Serial Number 462,5GS. Such an apparatus for earryingout my inventionis the accompanying' drawing.

In this a source of current supply, not shown;

c a cap applied toveach end of the tub drawing, a is` a silica' tube Within' which are the electrodes Y), connected with l D i )ect-matter .of the -p'resent invention` a curally seal the connection at .that point. 'The electrodes b are' herinetically sealed4 with respect to the cap. ,Theelectrodes are provided Witli proper feeding mechanism. l'The -cap c .is such that one portion of. the cap .closely Jsurrounds the tube d and' another .port-ion closely surrounds`A they electrodes. Between these two portions 'of vthe'c'aps a are,.respectively, the-passages d ande which 'connect with the 'space between the' inner :wall of tube a' andthe electrodesb. The tube ais surrounded by a tube 7L, preferably formed of glass in order' to see the Operation within the` tube u. lThe endsof this tube L are closed by the caps z', one cap ha'V-, ingthe inlet opening j and the other the outletk for the circulation of the cooling medium.' g.'

Surrounding. thetube'h between the -elec-v l trodes b are a series of ielhd magnets or rings phase 'current or` currents, thus "producing nets 4arearrang ;e.dvas shown` so that thepoles and S. are alternately placed. Thi'sfc'aus'es the' arc formed between theelectrodes 'not only to rotate\ but to pass from 'side' to. side. of the tube,ias shownat p in the drawing. l

. 1n operation, tli'e! air is .forced .through the passage ve into the zone betweenl the electrode?. Then the arc' is produced and the'l rotarymagnetic fields in action, the arc/1s caused to 'rotateand to beblown from side to side of the tube. This spreads the' arc in the tube. 'By thisv arrangement.' the air Will surely have to pass through the 'arc as many times as the arc crosses over thejtube and bef tween passages iseooled by contact lwith the surrounding cool-ing medium as in-'myhereii-ib'et'orc mentioned previous application. 'Ifile-produced oxids of 11it1ogen,"which are the lower oxids of4 nitrogen, pass into the space between the electrodes and the Wall of. the tube, escaping bythe passage d, vfrom' 'which' they may be led into water Where they are' converted into nitric acid in the ordinary 'lViththe construction -formingA the sub-l or more tobe advantageous.

II'Iaving noiv fully'described lmy inventionl 4 .Z, m, iz and o, which areenergized' by a' polyi *75 'rotating magnetic fields.l These lfield mag-,

Baiellb 'Surface f Said *container .s adapted'. to be' plateedfrotary mgnetic elds exterior f the Container 'nthe, .are space7 :and extending 

